<!--
 * @Author: liuyonghu
 * @Date: 2021-12-22 15:25:21
 * @LastEditTime: 2021-12-22 18:36:35
 * @LastEditors: liuyonghu
 * @Description: 
 * @FilePath: /learn-three-js/21-1222/index.html
-->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>第一个three.js文件_WebGL三维场景</title>
    <style>
      body {
        margin: 0;
        overflow: hidden;
        /* 隐藏body窗口区域滚动条 */
      }
    </style>
    <!--引入three.js三维引擎-->
    <!-- <script src="http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.js"></script> -->
    <script src="./../three.js"></script>
    <script src="./../orbitControls.js"></script>
    <!-- <script src="http://www.yanhuangxueyuan.com/threejs/build/three.js"></script> -->
  </head>

  <body>
    <script>
      /**
       * 创建场景对象Scene
       */
      var scene = new THREE.Scene();
      /**
       * 创建网格模型
       */
      // var geometry = new THREE.SphereGeometry(60, 40, 40); //创建一个球体几何对象
      var geometry = new THREE.BoxGeometry(100, 100, 100); //创建一个立方体几何对象Geometry
      var material = new THREE.MeshLambertMaterial({
        color: 0x0000ff,
      }); //材质对象Material
      var mesh = new THREE.Mesh(geometry, material); //网格模型对象Mesh
      scene.add(mesh); //网格模型添加到场景中
      /**
       * 光源设置
       */
      //点光源
      var point = new THREE.PointLight('#fff');
      point.position.set(500, 200, 300); //点光源位置
      scene.add(point); //点光源添加到场景中
      //环境光
      var ambient = new THREE.AmbientLight('#000');
      scene.add(ambient);
      // console.log(scene)
      // console.log(scene.children)
      /**
       * 相机设置
       */
      var width = window.innerWidth; //窗口宽度
      var height = window.innerHeight; //窗口高度
      var k = width / height; //窗口宽高比
      var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大
      //创建相机对象
      var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000);
      camera.position.set(200, 300, 200); //设置相机位置
      camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
      /**
       * 创建渲染器对象
       */
      var renderer = new THREE.WebGLRenderer();
      renderer.setSize(width, height); //设置渲染区域尺寸
      renderer.setClearColor('orange', 1); //设置背景颜色
      document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
      //执行渲染操作   指定场景、相机作为参数
      // renderer.render(scene, camera);

      function animate() {
        requestAnimationFrame(animate);
        mesh.rotation.x += 0.01;
        mesh.rotation.y += 0.01;
        render();
      }

      function render() {
        renderer.render(scene, camera); //执行渲染操作
      }
      render();
      //   animate();

      var controls = new THREE.OrbitControls(camera, renderer.domElement); //创建控件对象
      controls.enableRotate = false;
      controls.minPolarAngle = 0;
      controls.maxPolarAngle = Math.PI;
      controls.addEventListener('change', render); //监听鼠标、键盘事件
    </script>
  </body>
</html>
